﻿using System.Threading;
using DM4;
using sscore;
using System;
using System.Collections.Generic;
using sscore.Utils;
using System.Text.RegularExpressions;
using System.IO;
using sscore.Requests;
using System.Net;

namespace DE
{
    public class DE : ModuleBase
    {
        private readonly string _searchUrl;
        private readonly string _offenderLink;
        private readonly string _imageLink;
        private const string StateName = "DE";
        private ResultFile _imagesResultFile;
        readonly string[] _searchParam = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };

        public DE()
        {
            //initialize main system constants
            ModuleCode = "SO_DE";
            Description = "DE Sex Offenders";
            Version = "1.0";

            //for creating sessions
            StartParam = 0;
            StopParam = _searchParam.Length - 1;

            //initialize help 
            AddToHelp(DM4Consts.StartPosition, String.Format("{0}...{1}", StartParam, StopParam));
            AddToHelp(DM4Consts.EndPositon, String.Format("{0}...{1}", StartParam, StopParam));

            AddToHelp(DM4Consts.IsDownload, "true|false");
            AddToHelp(DM4Consts.IsDownloadImg, "true|false");
            AddToHelp(DM4Consts.InsertToDb, "false|true", "(Expected: servername, dbname)");
            AddToHelp(DM4Consts.ServerName, "");
            AddToHelp(DM4Consts.DbName, "");
            AddToHelp(DM4Consts.IsClearDb, "false|true");
            AddToHelp(DM4Consts.TestParam, "false|true");

            Rpm.Codepage = EncodingType.Iso88591;
            RootUrl = "http://sexoffender.dsp.delaware.gov/"; //root url
            _searchUrl = string.Format("{0}cgi-bin/sexoff.cgi/name?lname={{0}}", RootUrl);
            _offenderLink = string.Format("{0}cgi-bin/sexoff.cgi/d?opt={{0}}", RootUrl);
            _imageLink = string.Format("{0}mugshots/{{0}}.jpg", RootUrl);
        }

        private void SetParametersDefaults()
        {
            Params.CreateBooleanParam(DM4Consts.IsDownload, true);
            Params.CreateBooleanParam(DM4Consts.IsDownloadImg, true);
            Params.CreateBooleanParam(DM4Consts.InsertToDb, false);
            Params.CreateBooleanParam(DM4Consts.IsClearDb, false);
            Params.CreateStringParam(DM4Consts.DbName, "");
            Params.CreateStringParam(DM4Consts.ServerName, "");
            Params.CreateIntegerParam(DM4Consts.StartPosition, StartParam);
            Params.CreateIntegerParam(DM4Consts.LastPosition, Params.GetIntegerParam(DmConsts.StartPosition));
            Params.CreateIntegerParam(DM4Consts.EndPositon, StopParam);
            Params.CreateIntegerParam(DM4Consts.LastRecord, 0);
        }

        public override OperationResult Init(IDM4Core iCore, DmTaskParams param)
        {
            //use basic initialization sequence
            base.Init(iCore, param);

            SetParametersDefaults();
            return new OperationResult { Result = DM4Consts.Ok };
        }

        public override OperationResult Start()
        {
            DoWork();
            return new OperationResult { Result = DM4Consts.Ok };
        }

        public override OperationResult DoWork()
        {
            OperationResult or = new OperationResult { Result = DM4Consts.ErrorUnknown };

            if (!Ct.IsCancellationRequested)
            {
                WriteLog("Start parameters:", MessageType.Warning);
                foreach (KeyValuePair<string, string> kvp in Params.GetDictionary()) //get all existing parameters
                    WriteLog(String.Format("Key = {0}, Value = {1}", kvp.Key, kvp.Value), MessageType.Warning);

                if (Params.GetBooleanParam(DM4Consts.IsDownload))
                    Load();

                if (Params.GetBooleanParam(DM4Consts.InsertToDb))
                    if ((Params.GetStringParam(DM4Consts.DbName) == "") || (Params.GetStringParam(DM4Consts.ServerName) == ""))
                    {
                        or.Message = String.Format("{0} or {1} is empty", DM4Consts.DbName, DM4Consts.ServerName);
                        ResultCode = DM4Consts.SessionResultCodeError;
                        ResultMessage = or.Message;
                        UpdateStatus(DmConsts.Error);
                        WriteErrorLog(or.Message); //writting to error and session log   

                        return or;
                    }
                    else
                    {
                        //insert offenders to db 
                        UpdateStatus(DM4Consts.SessionInsertToDb);

                        Offenders.OffInsertToDatabase(StateName, Params.GetStringParam(DmConsts.DbName),
                             Params.GetStringParam(DmConsts.ServerName), ResultDir, Params.GetBooleanParam(DmConsts.IsClearDb),
                             WriteLog);

                    }

                //check if need abort task
                if (Ct.IsCancellationRequested)
                {
                    ResultCode = DM4Consts.SessionResultTerminateByUser;
                    ResultMessage = "Session terminated by user";
                    UpdateStatus(DM4Consts.SessionWait);
                    WriteLog("Session aborted by user", MessageType.Cool);
                }
                else
                {
                    UpdateProgress(1);
                    ResultCode = DM4Consts.SessionResultCodeOk;
                    ResultMessage = String.Format("Session complete, errors : {0}, records : {1}", TaskParams.ErrorCount, TaskParams.RecordCount);
                    UpdateStatus(DM4Consts.SessionComplete);
                    WriteLog("------------Finish----------------", MessageType.Cool);
                }
            }
            else
            {
                ResultCode = DM4Consts.SessionResultTerminateByUser;
                ResultMessage = "Session terminated by user";
                UpdateStatus(DM4Consts.SessionWait);
                WriteLog("Session aborted by user", MessageType.Cool);
            }


            return or;
        }

        private void Load()
        {
            string resultFileName = String.Format("{0}\\{1}.{2}", ResultDir, TaskParams.SessionId, DmConsts.ResultFilesExtension);
            bool workFlag = true;

            ResultFile = new ResultFile(resultFileName, OffendersResult.GetHeader());
            _imagesResultFile = new ResultFile(String.Format("{0}\\{1}_images.{2}", ResultDir, TaskParams.SessionId, DM4Consts.ResultFilesExtension), "FileName|FileUrl");
            try
            {
                while (workFlag)
                {
                    //рабочий цикл
                    string error;

                    try
                    {
                        error = "";  //Required!!  /*if (!String.IsNullOrEmpty(error)) --> restart thread; else --> download finished*/

                        WriteLog("Start download...");
                        Searching();
                    }
                    catch (Exception e)
                    {
                        error = e.Message;
                    }

                    if (!String.IsNullOrEmpty(error))
                    {
                        Thread.Sleep(30000);
                        WriteErrorLog(error);
                        WriteLog("Try continue work...", MessageType.Warning);
                    }
                    else
                    {
                        workFlag = false;  //все нормально откачало, заканчиваем работу
                    }
                }
            }
            finally
            {
                ResultFile.Close();
                _imagesResultFile.Close();
            }
        }

        private void Searching()
        {
            if (Test)
            {
                Params.SetIntegerParam(DmConsts.LastPosition, Params.GetIntegerParam(DmConsts.StartPosition));
                Params.SetIntegerParam(DmConsts.EndPositon, Params.GetIntegerParam(DmConsts.StartPosition));
            }
            if (Params.GetIntegerParam(DmConsts.EndPositon) > StopParam)
                Params.SetIntegerParam(DmConsts.EndPositon, StopParam);

            for (int indSearchParam = Params.GetIntegerParam(DmConsts.LastPosition); indSearchParam <= Params.GetIntegerParam(DmConsts.EndPositon); indSearchParam++)
            {
                //check if need abort task
                if (Ct.IsCancellationRequested)
                    break;

                Params.SetIntegerParam(DmConsts.LastPosition, indSearchParam);
                UpdateProgress();

                WriteLog(string.Format("Process search param [{0}][{1}].",
                    Params.GetIntegerParam(DmConsts.LastPosition),
                    _searchParam[Params.GetIntegerParam(DmConsts.LastPosition)]));

                string html = GetRequest.WithCookies(string.Format(_searchUrl, _searchParam[Params.GetIntegerParam(DmConsts.LastPosition)]), Rpm);
                html = CheckHtml(html);
                ParseResultPage(html);
            }
        }

        private void ParseResultPage(string html)
        {
            html = HtmlUtils.KillSpace(HtmlUtils.ReplaceSpecSymbols(html.Replace("\r\n", " ").Replace("\t", " ").Replace("\r", " ").Replace("\n", " ")));

            MatchCollection mc = RegExpr.ParseMatchCollection(html, @"(?si:cgi-bin/sexoff.cgi/d\x3Fopt=([\S]+)"">)");
            WriteLog(String.Format("found [{0}] matches", mc.Count));
            if (mc.Count == 0)
                throw new Exception(DmConsts.ExcNeedRestart + Environment.NewLine + html);

            List<string> list = new List<string>();
            foreach (Match matchLoc in mc)
                if (!list.Contains(matchLoc.Groups[1].Value))
                    list.Add(matchLoc.Groups[1].Value);

            WriteLog(String.Format("found [{0}] id[s]", list.Count));

            for (int i = Params.GetIntegerParam(DmConsts.LastRecord); i < list.Count; i++)
            {
                //check if need abort task
                if (Ct.IsCancellationRequested)
                    break;

                Params.SetIntegerParam(DmConsts.LastRecord, i);
                string lookupKey = list[i];
                string offenderHtml = GetRequest.WithCookies(string.Format(_offenderLink, lookupKey), Rpm);
                WriteLog(String.Format("ParseOffender [{0}][{1}]", Params.GetIntegerParam(DmConsts.LastRecord), lookupKey));

                if (!RegExpr.IsMatch(offenderHtml, @"(?si:Offender Information)"))
                    throw new Exception("Offenders page:" + DmConsts.ExcNeedRestart);

                ParseOffender(offenderHtml, lookupKey);
                UpdateRecordCount(1);

            }
            Params.SetIntegerParam(DmConsts.LastRecord, 0);
        }

        private void ParseOffender(string offenderHtml, string lookupKey)
        {
            const string crimeCaption = "Date; State; Statute; Description; Victim~";
            offenderHtml = HtmlUtils.KillSpace(HtmlUtils.ReplaceSpecSymbols(offenderHtml.Replace("\r\n", " ").Replace("\t", " ").Replace("\r", " ").Replace("\n", " ")));
            using (OffendersResult or = new OffendersResult())
            {
                or.Source_State = StateName;
                or.offenderLink = string.Format(_offenderLink, lookupKey);
                or.Source_id = lookupKey;

                string expr = @"(?si:mugshots/([^<>]+).jpg"")";
                string offenderHtmlImgUrl = RegExpr.Parse(offenderHtml, expr);
                if (Params.GetBooleanParam(DmConsts.IsDownloadImg) && offenderHtmlImgUrl != "")
                {
                    or.Image_ID = Guid.NewGuid() + ".jpg";
                    try
                    {
                        or.ImageLink = string.Format(_imageLink, offenderHtmlImgUrl);
                        Offenders.DownloadImageWithExceptions(_imagesResultFile, String.Format("{0}\\{1}\\{2}", ResultDir, DmConsts.PhotosDir, or.Image_ID),
                            or.ImageLink, TaskParams.SessionId);
                    }
                    catch (WebException ex)
                    {
                        if (((HttpWebResponse)ex.Response).StatusCode == HttpStatusCode.NotFound)
                        {
                            or.Image_ID = "";
                            or.ImageLink = "";
                        }
                        else throw new Exception(DmConsts.ExcInvalidLoadingImage, ex);
                    }
                }

                if (offenderHtml.Contains("<b>WANTED</b>"))
                    or.Status = "WANTED";
                or.Risk = RegExpr.Parse(offenderHtml, @"(?si:<b>([^<>]+)\s*Risk</b>)").Trim();

                offenderHtml = HtmlUtils.KillSpace(RegExpUtils.DeleteTag(offenderHtml));

                or.fullname = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Name\s*</td>\s*<td>([^<>]+)</td>)").Trim();

                or.Address_date = RegExpr.Parse(offenderHtml, @"(?si:Information last verified on\s*:\s*([^<>]+)</p>)").Trim();
                or.Birthdate = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*DOB\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.Ethnicity = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Race\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.eye_color = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Eyes\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.hair_color = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Hair\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.height = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Height\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.skin = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Skin\s*</td>\s*<td>([^<>]+)</td>)").Trim();
                or.weight = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Weight\s*</td>\s*<td>([^<>]+)</td>)").Replace("lbs.", " lbs.").Trim();
                or.sex = RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Sex\s*</td>\s*<td>([^<>]+)</td>)").Trim();

                or.registered = RegExpr.Parse(offenderHtml, @"(?si:<p>\s*Registered on\s*:\s*([^<>]+)</p>)").Trim();

                MatchCollection mc = RegExpr.ParseMatchCollection(RegExpr.Parse(offenderHtml, @"(?si:>\s*Aliases\s*</td>(.*?)</table>)")
                    , @"(?si:<td>([^<>]+)</td>)");
                foreach (Match match in mc)
                    if (match.Groups[1].Value.Trim() != "")
                        or.AKA += match.Groups[1].Value.Trim() + "@";
                or.AKA = HtmlUtils.KillSpace(or.AKA);

                mc = RegExpr.ParseMatchCollection(RegExpr.Parse(offenderHtml, @"(?si:<td>\s*Description\s*</td>\s*<td>\s*Victim Info\s*</td>\s*</tr>(.*?)</table>)")
                    , @"(?si:<tr>\s*<td>([^<>]*?)</td>\s*<td>([^<>]*?)</td>\s*<td>([^<>]*?)</td>\s*<td>(.*?)</td>\s*<td>(.*?)</td>\s*</tr>)");
                foreach (Match match in mc)
                {
                    or.Crime += match.Groups[1].Value.Trim() + ";";
                    or.Crime += match.Groups[2].Value.Trim() + ";";
                    or.Crime += match.Groups[3].Value.Trim() + ";";
                    or.Crime += match.Groups[4].Value.Trim() + ";";
                    or.Crime += match.Groups[5].Value.Trim() + "~";
                }
                if (or.Crime != "") or.Crime = crimeCaption + or.Crime;

                expr = @"(?si:<td>\s*Employer Name\s*:\s*</td>\s*<td>([^<>]+)</td>\s*</tr>\s*<tr>\s*<td>\s*Address\s*:\s*</td>(.*?)<td>\s*Last Known Place of Study)";
                or.Employer = RegExpr.Parse(offenderHtml, expr).Trim();
                if (or.Employer == "Unemployed")
                    or.Employer = "";
                else
                {
                    mc = RegExpr.ParseMatchCollection(RegExpr.Parse(offenderHtml, expr, 2)
                        , @"(?si:<td>([^<>]+)</td>)");

                    foreach (Match match in mc)
                        if (match.Groups[1].Value.Trim() != "")
                            or.waddress += match.Groups[1].Value.Trim() + "@";

                    or.waddress = HtmlUtils.KillSpace(or.waddress);
                }

                int iSkippedGroup = -1;
                expr = @"(?si:>\s*Address\s*</td>(.*?)<td>\s*Race\s*</td>)";
                mc = RegExpr.ParseMatchCollection(RegExpr.Parse(offenderHtml, expr)
                   , @"(?si:<td>([^<>]*?)</td>)");
                int i = 0;
                foreach (Match match in mc)
                {
                    if (i != iSkippedGroup && match.Groups[1].Value.Trim() != "")
                    {
                        if (match.Groups[1].Value.Trim() == "DOB" ||
                            match.Groups[1].Value.Trim() == "Height" ||
                            match.Groups[1].Value.Trim() == "Weight")
                            iSkippedGroup = i + 1;
                        else or.Address += match.Groups[1].Value.Trim() + "@";
                    }
                    i++;
                }
                or.Address = HtmlUtils.KillSpace(or.Address);

                if (or.Image_ID != "" && !File.Exists(String.Format("{0}\\{1}\\{2}", ResultDir, DmConsts.PhotosDir, or.Image_ID)))
                    throw new Exception(DmConsts.ExcImgNotFound);

                ResultFile.Write(or.GetValues());
            }
        }

        private string CheckHtml(string html)
        {
            if (string.IsNullOrEmpty(html))
                throw new Exception(DmConsts.ErrEmpty);

            if (!RegExpr.IsMatch(html, @"(?si:Questions about Sex Offender Registration, or to report problems with this page, send Email to)"))
                throw new Exception("Site response: \"Access Denied\"");

            return html;
        }

        private void UpdateProgress()
        {
            if (Params.GetIntegerParam(DmConsts.StartPosition) > Params.GetIntegerParam(DmConsts.EndPositon))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.StartPosition), Params.GetIntegerParam(DmConsts.EndPositon),
                    DmConsts.StartPosition, DmConsts.EndPositon));
            if (Params.GetIntegerParam(DmConsts.LastPosition) > Params.GetIntegerParam(DmConsts.EndPositon))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.LastPosition), Params.GetIntegerParam(DmConsts.EndPositon),
                    DmConsts.StartPosition, DmConsts.EndPositon));
            if (Params.GetIntegerParam(DmConsts.StartPosition) > Params.GetIntegerParam(DmConsts.LastPosition))
                throw new Exception(String.Format("Invalid parameters {2}[{0}]; {3} [{1}]",
                    Params.GetIntegerParam(DmConsts.StartPosition), Params.GetIntegerParam(DmConsts.LastPosition),
                    DmConsts.StartPosition, DmConsts.LastPosition));
            UpdateProgress(((double)(Params.GetIntegerParam(DmConsts.LastPosition) - Params.GetIntegerParam(DmConsts.StartPosition))) / (Params.GetIntegerParam(DmConsts.EndPositon) - Params.GetIntegerParam(DmConsts.StartPosition) + 1));
        }
    }
}
